Aug 02 00:25:26.675 INFO checking roaring-0.5.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 00:25:26.675 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 00:25:26.676 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 00:25:26.676 INFO running `"docker" "create" "-v" "/tmp/crater.sYpnL9rrPEuB:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2+tmplazy:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 00:25:26.910 INFO blam! b3f4dede2b665e461d5c976c3a720e6eca92460fe84277256dc0c8ca3d844ee8
Aug 02 00:25:26.914 INFO running `"docker" "start" "-a" "b3f4dede2b665e461d5c976c3a720e6eca92460fe84277256dc0c8ca3d844ee8"`
Aug 02 00:25:29.128 INFO kablam!     Checking roaring v0.5.2 (file:///source)
Aug 02 00:25:34.848 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 00:25:34.848 INFO kablam!  --> benches/lib.rs:1:1
Aug 02 00:25:34.848 INFO kablam!   |
Aug 02 00:25:34.848 INFO kablam! 1 | #![feature(test)]
Aug 02 00:25:34.848 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 00:25:34.848 INFO kablam! 
Aug 02 00:25:34.854 INFO kablam! error: aborting due to previous error
Aug 02 00:25:34.857 INFO kablam! 
Aug 02 00:25:34.857 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 00:25:34.871 INFO kablam! error: Could not compile `roaring`.
Aug 02 00:25:34.872 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 00:25:37.465 INFO kablam! error: build failed
Aug 02 00:25:37.467 INFO kablam! su: No module specific data is present
Aug 02 00:25:37.995 INFO running `"docker" "rm" "-f" "b3f4dede2b665e461d5c976c3a720e6eca92460fe84277256dc0c8ca3d844ee8"`
Aug 02 00:25:38.145 INFO blam! b3f4dede2b665e461d5c976c3a720e6eca92460fe84277256dc0c8ca3d844ee8